(100) Offset (111) 2 °, (100) Offset (111) 6 °, (100) Offset (111) 15 ° The three crystal planes of GaAs have different atomic plane densities and layer spacings, which leads to the phases The number of atoms in contact is also different.
Due to the difference of atomic surface density and layer spacing, the number of atoms in contact with each other is different during the scratching process.<br>